Improvement in harrows



waited rmer @anni dtiiilire.

Letters PateutNo.95,467, dated October 5, 1869.

IMPROVEMENT VIN HARROWS.

The Schedule referred to in these Letters Patent and making part of the same.

To all `whom it may concern:

Be it knownthatwe, P. S. GRAVES and P.. B. PAR- GELL, of Ashmore, in the county of Goles, and 'State of Illinois, have invented a new and nsefullm'prove-v ment in Harrows; and we do hereby declare that the following is a full, clear, and exact description thereof', which will enable others skilled in the art to make and use the same, reference being .had to the accompanying. drawings, forming part of this specification.

Our invention relates to an improvementin harrows which have 'reversible teeth; and consists in a certain combination, construction, and arrangement of parts, which will be more particularly described hereafter.

' In the 'accompanying sheet of drawings- Figure l represents a side elevation of the barrow.

Figure 2 is a top or plan View.

Similar letters of reference indicate corresponding parts.

This harrow is of the common triangular form, with the side-pieces of the fiame made of iron, connected together at the forward end.

A A represent 'the side-pieces which contain vertical mortises for receiving the teeth B. Y

Inthese mortises the teeth are pivoted or jointed by bolts or pins at thepointsnQso that they are allowed to turn freely onthe pins' or bolts.

The teeth extend about one-third of their length above the frame, and their upperv ends are jointed to the mils-D at the points E, so that by giving the rails l), or either of them, a longitudinal motion in either direction, the teeth will be thrown vforward or back, as may be desired.

As seen in g. 1, the points of the teeth are thrown slightly forward, so as to feed into ortake the ground, the barrow being drawn from the point F.

`By the movement of the bars D back or forward longitudinally, the teeth will-be made to stand at an angle of, say, forty-five degrees, more or less.

When the points of the teeth are thrown back, they will not of course penetrate the ground, and the har# row may be drawn over the ground with ease to cr from the field.

By varying the position of the teeth from the perpendicular, they may be made to take to the ground as much or as little as may be desired.

The bars D are operated or thrown longitudinally back and forth by means of' levers G, which, in this example of ourinvention, are formed by extending a. tooth upward on each side of the hai-row. The'bars D are connected with the levers G, the fnlcrum of the levers being at the points' C.

The lever is held in position by means of a circular bar, H, which is attached to the side of the frame, as seen in fig. 1.

These circles are provided with a series of "holes, andv on the side of each of the levers there is a springy bar, with a pin on its lower end, which pin passes through the lever, and enters any hole in the circle, thus governing the position of the lever and the teeth while the circles serve as guides for the levers.

The two sides of the barrow are kept extended by means of transverse Wooden bars, J and K, which snpport the handles L L, by means of the stands m.

When the barrow-teeth are putin with bolts or pins, they or any portion of them may be readily removed, and cultivator-teeth substituted therefor.

The advantages of this method of constructing harrows will be readily understood and appreciated by all agriculturists. v

Having thus described our invention,

We claim as new, and desire to secure by Letters Patent- A The combination of a triangular frame, A, and two converging continuons rods, D, with a series of pivoted shifting-lever teeth, arranged at any angle' thereto, as shown and'described. f

' P. SL GRAVES.

1. B. PARGELL.

Witnesses:

WM. HAwKINs,

WM. P. GREEN. 

